With a population of around 14,500, Hopatcong sits in New Jersey, United States. The city operates in the Eastern Time Zone.
In 2025, Hopatcong averaged an annual temperature of 50°F, with hottest temperatures reaching 93°F in June and lowest around -1°F in January. The city received approximately 42 inches of precipitation during the year.
View historical weather for Hopatcong · More cities in New Jersey